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Div.
02760  |
|
|
NO. 221 
HI-SPEC®
POLYMERIC HOT-APPLIED SEALANT
SEALTIGHT HI-SPEC has no equal
pound-for-pound for total life-cycle cost efficiency and return on investment.
Technical Description
SEALTIGHT HI-SPEC Polymeric Hot-Applied Sealant is a premium-quality,
single-component joint sealing compound. It is formulated with a carefully
balanced blend of 100% virgin polymer, asphalt, plasticizers and inert,
reinforcing fillers to produce a hot-pour joint sealant with excellent
bonding properties, high resiliency, ductility and resistance to degradation
from weathering. It will not become brittle at low temperatures; will
not flow or migrate from the joint at temperatures up to 140ºF (60ºC).
Uses
HI-SPEC is recommended for large-scale sealing of joints
and cracks in Portland Cement and asphaltic concrete pavements because
of its excellent cost efficiency, long sealant life and high return on
investment. Typical applications include sealing expansion and contraction
joints in concrete highways – both transverse and longitudinal –
joints between concrete pavements and asphaltic shoulders and random cracks
in both Portland Cement and asphaltic concrete pavements.
Advantages and Benefits
- Provides an economical hot-pour, single-component sealant for large-scale sealing of Portland Cement and asphaltic concrete pavements
- Recognized by public and private sector sealing contractors as the "best available" and "most cost efficient" joint sealant
- Produces tough, dependable joint seals with exceptional longevity
- Offers excellent cohesive and adhesive qualities
- Resists degradation from weathering
- Remains ductile and resilient at low temperatures
- Will not flow or migrate at temperatures up to 140ºF (60ºC)
Application Tools
|
 Air Compressor
|
 Melter-Applicator with
Wand
|
 Router |
Application
MELTING: HI-SPEC should be melted
in a conventional double-boiler, oil-jacketed melter-applicator equipped
with an agitator and separate control thermometers for both the oil bath
and melting vat. On start-up of the melting kettle, add small quantities
of HI-SPEC with the plastic bag liner to the melter.
CONTROL MATERIAL TEMPERATURES AT 370ºF (188ºC). NEVER EXCEED
390ºF (199ºC). RECOMMENDED POURING TEMPERATURE IS 370ºF
(188ºC).
Only melt enough material to be poured the same day. Material should be
added to the melter as the sealant is withdrawn during the sealing operation.
SURFACE PREPARATION
The joints and cracks to be sealed must
be clean and dry. Dust, dirt and laitance should be removed prior to application.
Asphaltic Pavement and Maintenance Sealing
- For ideal sealing with maximum effectiveness, it is suggested that cracks
or joints be routed out to provide a sealant resevoir 1/2" (12.7mm)
wide with a minimum depth of 1/2" (12.7mm). This provides for a 1:1
width-to-depth ratio. For joints 1" (25.4mm) wide, the suggested
depth is 1/2" (12.7mm) minimum.
Proper routing should be slightly larger than the existing crack/loint
to ensure proper adhesion to sidewalls. The sealant should be applied
into the crack/joint from the bottom up, slightly overfilling. Once applied,
a follow-up should be done with a soft rubber, U-shaped squeegee to form
a wipe zone of approximately 3-4 inches (76-2 - 101.6mm) wide along the
crack/joint and flush with the highway or pavement surface. To control
and maintain the suggested joint depth and sealant usage, SEALTIGHT CERA-ROD
Heat-Resistant Backer Rod may be installed in the joint opening.
New Concrete Pavement Sealing - Typical joint configuration should be 3/8" (9.54mm) wide
with a 1/2" (12.7mm) depth for an approximate 1:1 width to depth
ratio. Designated joint width and depth is determined by the appropriate
highway or pavement authority. SEALTIGHT CERA-ROD Heat-Resistant Backer
Rod may be installed in the joint opening to control depth and sealant
usage.
Precautions
DO NOT DILUTE. Do not heat to temperatures above 390ºF
(199ºC). Reheating or prolonged (over 6 hours) heating at or above
the safe temperature of 390ºF (199ºC) could cause this material
to gel in the application equipment. A rapid increase in viscosity, accompanied
with stringiness, signals the approach of gelation. Should this happen,
the material must be rapidly pumped from the melting kettle and discarded.
Apply sealant when substrate and air temperatures are 40ºF (4Cº)
or higher. For optimum sealant performance all material left in the melter-kettle
should be drawn off and discarded. Lines should be flushed out clean.
Do not dilute with solvent. Read and follow application information and
precautions. Refer to Material Safety Data Sheet for complete health and safety information.
Packaging
50 lb. (22.7 kg) container
55 lb. (24.95 kg) cartons. Each carton contains two 27 1/2 lb. (12.475
kg) buns in polypropylene liners.
Specifications
ASTM D 3405
Federal Specification SS-S-1401C
FAA Specification Item P-605
Corps of Engineers CRD-C 530
AASHTO M 301
Coverage
72.2 lbs./ft. (1,158 kg/m). A joint
1/2" x 1/2" (12.7mm x 12.7mm) will require 12.6 lbs./100 linear
feet (18.5 kg/100m).
PHYSICAL PROPERTIES
| Pour point Prolonged heating Penetration Flow Bond Resiliency Asphaltic Concrete Compatibility |
370ºF (188ºC)
6 hours Less than .90cm Less than .3cm Passed 100% extension @ 0ºF(-17ºC) Passed 50% extension @ -20ºF (-29ºC) More than 60% Compatible |
This material last updated August, 2000.
| Div.
02760 |
|
|